IR SPECTROSCOPY AND SINGLE CRYSTAL X-RAY DIFFRACTION STUDY OF 1,2-BIS(2-AMINOPHENOXY)-ETHANE, 1,5-BIS(2-AMINOPHENOXY)-3-OXAPENTANE, AND 1,8-BIS(2-AMINOPHENOXY)-3,6-DIOXAOCTANE
O. V. Koryakova1, M. L. Isenov1, E. S. Filatova1,2, O. V. Fedorova1,2
1Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia 2Ural Federal University, Ekaterinburg, Russia
Keywords: 1,2-бис(2-аминофенокси)-этан, 1,5-бис(2-аминофенокси)-3-оксапентан, 1,8-бис(2-аминофенокси)-3,6-диоксаоктан, ИК спектроскопия, РСА, 1,2-bis(2-aminophenoxy)-ethane, 1,5-bis(2-aminophenoxy)-3-oxapentane, 1,8-bis(2-aminophenoxy)-3,6-dioxaoctane, IR spectroscopy, XRD
Abstract
Vibrational spectra of 1,2-bis(2-aminophenoxy)-ethane, 1,5-bis(2-aminophenoxy)-3-oxapentane, and 1,8-bis(2-aminophenoxy)-3,6-dioxaoctane - podands, different in the length of oxyethylene fragments, are measured and their single crystal X-ray diffraction analysis is performed. It is demonstrated that the strength of intermolecular hydrogen bonds (IMHB) with the participation of NH groups increases with the elongation of the oxyethylene spacer. According to the XRD data for 1,2-bis(2-aminophenoxy)-ethane, the weakest hydrogen bonds are characteristic. From the IR spectra, important intermolecular hydrogen bonds are typical of 1,8-bis(2-aminophenoxy)-3,6-dioxaoctane having the longest oxyethylene fragment.
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